package com.qk.filter;

import com.qk.utils.JwtUtils;
import jakarta.servlet.*;
import jakarta.servlet.annotation.WebFilter;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import lombok.extern.slf4j.Slf4j;

import java.io.IOException;
@Slf4j
@WebFilter(urlPatterns = "/*")
public class TokenFilter implements Filter {
    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;
        //获取请求路径
        String uri = request.getRequestURI();
        //判定是否为登录请求
        if(uri.contains("/login")){
            log.info("登录请求{}", uri);
            filterChain.doFilter(request, response);
            return;
        }
        //获取请求头token
        String jwt = request.getHeader("token");
        //判断token是否为空
        if (jwt == null || jwt.isEmpty()){
            log.info("请求头token为空");
            response.setStatus(401);
            return;
        }
        //解析令牌
        try {
            JwtUtils.parseToken(jwt);
        }catch (Exception e){
            log.info("令牌解析失败");
            response.setStatus(401);
            return;
        }
        //放行
        filterChain.doFilter(request, response);

    }
}
